Manganese(III) Acetate Catalyzed Oxidative Radical Additions of α-Dicarbonyl Compounds to 1- and 2-Phenylcyclohepta-1,3,5-triene
作者:Esra Findik、Mustafa Ceylan
DOI:10.1002/hlca.201000463
日期:2011.8
Manganese(III) acetate catalyzed oxidative radical‐addition reactions of α‐dicarbonyl compounds such as methyl acetoacetate (6), acetylacetone (7), and dimedone (8) to the mixture of 1‐ and 2‐phenylcyclohepta‐1,3,5‐triene (4 and 5) were investigated (Scheme 1). The 1‐phenylcyclohepta‐1,3,5‐triene (4) formed mainly [2+3] and [4+3] dihydrofuran addition products derived from cycloheptatriene and [2+3]
乙酸锰(III)催化α-二羰基化合物(如乙酰乙酸甲酯(6),乙酰丙酮(7)和二甲酮(8))与1和2-苯基环庚基1、3、5的混合物的氧化自由基加成反应对三烯(4和5)进行了研究(方案1)。1-苯基环庚-1,3,5-三烯(4)主要形成衍生自环庚三烯的[2 + 3]和[4 + 3]二氢呋喃加成产物以及衍生自正二十二碳烯结构的[2 + 3]二氢呋喃加成产物。2-苯基环庚-1,3,5-三烯(5)主要形成衍生自环庚三烯的[6 + 3]二氢呋喃加成产物和衍生自降丁烷结构的[4 + 3]二氢呋喃加成产物。分离产物的结构由其光谱数据(IR,1 H和13 C-NMR,MS和元素分析)建立,并与文献数据进行比较。讨论了产品的形成机理。